36results about How to "Reasonable mechanical properties" patented technology

The invention discloses a low-odor spray-molded automobile dashboard material and a preparation method thereof. The spray-molded automobile dashboard material comprises two layers, the surface layer is a water-based two-component in-mold paint layer, and the film inner paint is dispersed by water-based polyurethane The body reacts with the aliphatic curing agent to form a film with a certain thickness, the thickness is 10-100μm; the inner layer is a polyurethane layer, and the polyurethane layer contains amino polyether, polyether polyol, chain extender, cross-linking agent, catalyst, etc. and isocyanate compound Formed by polymerization reaction, thickness 0.5‑5 mm. When the material of the present invention is used to prepare an instrument panel, especially when the parts of the instrument panel are in different directions, the material can be solidified rapidly and the sagging phenomenon is avoided. In addition, the instrument panel made of the above materials has reasonable mechanical properties, excellent surface properties and aging resistance, which improves the explosion problem of the safety airbag of the car in an accident and improves the safety performance of the car. The invention discloses a preparation method of the instrument panel material.

The invention provides a three-dimensional roll bending forming device, which comprises a base, an X-direction motion drive mechanism, an X-direction ball screw assembly and a forming rack provided with a roll, wherein the forming rack is movably connected with the base. The three-dimensional roll bending forming device also comprises a Z-direction motion drive mechanism and a Z-direction ball screw assembly, wherein the Z-direction motion drive mechanism and the Z-direction ball screw assembly are vertically arranged; the Z-direction ball screw assembly comprises a Z-direction ball screw and a Z-direction nut assembly which is in rolling connection with the Z-direction ball screw through a ball; and one end of the Z-direction ball screw is linked with the Z-direction motion drive mechanism, and the Z-direction nut assembly is fixedly connected with the forming rack. Therefore, the three-dimensional roll bending forming device is capable of moving in an x and a y planes, and also moving in the Z-axis direction when raw materials are subjected to bending deflection operation; and the accuracy of carrying out bending deflection on the raw materials is improved, three-dimensional processing on the raw materials is realized, and the section bar obtained by processing has reasonable mechanical property.

The invention provides a new technology for preparing converter slag-regulating reagent by light-burning dolomite powder ash, which comprises the following steps of: carrying out particle size sieving on calcined dolomite; directly sending light-burning dolomite blocks of which the diameter is more than 5mm into a steel mill to be used; sieving the light-burning dolomite blocks of which the diameter is less than 5mm to a certain degree; crushing the light-burning dolomite blocks of which the diameter is more than 3mm to ensure that the particle size of the light-burning dolomite is less than 3mm; blending and adding certain binding agent and water into the light-burning dolomite powder ash of which the particle size is less than 3mm; pelletizing in a disc balling machine to obtain a light-burning dolomite pellet of which the particle size is more than 15mm; and after the pellet is conserved to meet a converter slag-regulating reagent requirement, sending the pellet to the steel mill to replace the light-burning dolomite block for use. According to the new technology disclosed by the invention, the light-burning dolomite powder ash is pelletized by adding a certain quantity of bonding agent and a proper quantity of water, and the technology is simple. In addition, due to the fact that the iron and steel enterprise has an abundant pellet production experience, the new technology is favorable for the high-value utilization of the light-burning dolomite powder ash, and has important meanings on energy saving, emission reduction and resource utilization of the iron and steel industry.

The invention provides an antistatic tube cloth for mining, which is formed by interweaving monofilaments in the warp direction and weft direction. In a square area of ​​2.5 cm by 2.5 cm, the number of monofilaments in the warp direction is at least 7, and at most 12, the number of monofilaments in the weft direction is at least 6 and at most 11. The invention overcomes the unreasonable weaving density of the mine-used anti-static tube cloth in the prior art, which affects the use in construction, and further achieves the effects of high strength and reasonable mechanical properties of the mine-used anti-static tube cloth.